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Metal-polyphenol coating and preparation method thereof

A metal and coating technology, applied in the field of metal-polyphenol coating and its preparation, can solve problems such as increasing data recording cost, achieve the effects of improving flatness and mechanical properties, uniform size, and avoiding cumbersome procedures

Active Publication Date: 2022-01-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in specific applications, it is necessary to pre-treat the paper with a polyphenol solution, and then use metal ion ink to print patterns and characters, which is a harsh choice for paper and printing equipment, which increases the cost of data recording

Method used

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  • Metal-polyphenol coating and preparation method thereof
  • Metal-polyphenol coating and preparation method thereof
  • Metal-polyphenol coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1 The preparation of a kind of TA-Fe coating

[0075] The present embodiment provides a kind of preparation method of TA-Fe coating, and the steps are as follows:

[0076] S1. Preparation of spray paint solution and printing dye solution

[0077] (1) prepare a buffer solution of 10mM Tris, and regulate the pH of the buffer solution to be 8.5;

[0078] Prepare a 0.6mM tannic acid aqueous solution; under magnetic stirring, slowly add to the buffer solution to ensure the full dissolution of tannic acid, the stirring time is: 0.5 ~ 24h;

[0079] Prepare 1.8mM Fe assembly precursor solution, quickly pour it into tris buffer system and tannic acid assembly precursor solution, stir for 30min, and obtain TA-Fe colloidal dispersion;

[0080] (2) Put the TA-Fe colloidal dispersion into a dialysis bag, sink the dialysis bag into a beaker with 2L deionized water, put a magnet at the bottom of the beaker to stir, and dialyze for 10-80 hours; all metals after dialysis T...

Embodiment 2

[0089] Embodiment 2 Preparation of a TA-Cu coating

[0090] This embodiment provides a kind of preparation method of TA-Cu coating, and the difference with embodiment 1 is:

[0091] Prepare a buffer solution of 10 mM Tris, and adjust the pH of the buffer solution to be 7.0 to 10.0;

[0092]Prepare 0.6mM tannic acid assembly precursor;

[0093] Prepare 1.8mM CuCl 2 aqueous solution;

[0094] The constant volume of 100mL CuCl 2 The aqueous solution was quickly poured into 100 mL tris buffer system tannic acid assembly precursor, stirred for 5 min, and dialyzed to obtain an aqueous dispersion of TA-Cu metal polyphenol colloids.

Embodiment 3

[0095] Embodiment 3 Preparation of a TA-Al coating

[0096] This embodiment provides a method for preparing a TA-Al coating, the difference from Example 1 is:

[0097] Prepare a buffer solution of 10 mM Tris, and adjust the pH of the buffer solution to be 7.0 to 10.0;

[0098] Prepare 0.6mM tannic acid assembly precursor;

[0099] Prepare 1.8mM AlCl 3 aqueous solution;

[0100] The constant volume of 100mL AlCl 3 The assembly precursor solution was quickly poured into 1000mL tris buffer system tannic acid assembly precursor solution, stirred for 5 minutes, and dialyzed to obtain TA-Al metal polyphenol colloidal dispersion.

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Abstract

The invention belongs to the technical field of plane material coating modification and inking printing and dyeing, and particularly relates to a metal-polyphenol coating and a preparation method thereof. The preparation method of the metal-polyphenol coating comprises the following steps: forming the metal-polyphenol coating on the surface of a planar material in a spraying or printing manner by taking an aqueous dispersion containing a metal-polyphenol colloid or an organic dispersion containing the metal-polyphenol colloid as a coating; the metal-polyphenol colloid is a colloidal particle aggregate formed by complexing and coordinating tannic acid and transition metal ions, the zeta potential of the metal-polyphenol colloid is -40mV to -35mV, and the average particle size of the metal-polyphenol colloid is 90-150nm. When the method is used for modifying various macroscale flat plates and membrane materials, the process procedure can be simplified, ordered and controllable stacking can be achieved on the substrate, controllable increase of the thickness of the coating is achieved, and compared with a traditional discrete assembly mode, the flatness and mechanical performance of the coating are improved through the method. Meanwhile, when the method is used for inking printing and dyeing, the problem that traditional printing procedures are tedious is solved.

Description

technical field [0001] The invention belongs to the technical field of planar material coating modification and ink printing and dyeing, and in particular relates to a metal-polyphenol coating and a preparation method thereof. Background technique [0002] Metal-polyphenol coatings are supramolecular coatings, which have received extensive attention and research in the field of material interface engineering technology because of their indiscriminate adhesion to the substrate. At present, metal-polyphenol coatings are widely coated on the surface of nanomaterials and planar materials for adsorption catalysis, water treatment, and packaging and transport of substances. [0003] The metal-polyphenol coating has long-term integrity and flexible plasticity; tannic acid, as a two-component assembly of polyelectrolyte and metal cation, determines that the coating has dual properties and charge tunability of organic electrolyte and metal cation ; Abundant oxygen-containing groups ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D187/00C09D11/102C08G83/00B41M5/00B05D7/24B05D3/04B05D3/00B05D1/02
CPCC09D187/00C09D11/102C08G83/008B41M5/0011B41M5/0023B05D1/02B05D7/24B05D3/0413B05D3/002
Inventor 刘延琦叶钢陈靖
Owner TSINGHUA UNIV
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